Effects of 8-Week CrossFit-Based Concurrent Training on Fitness, Body Composition, and Psychological Outcomes in Schoolchildren

This study examines the effects of an 8-week CrossFit-based concurrent training program in boys and girls aged 7 to 11 years, comparing an experimental group (n=15) with a control group (n=15). The aim is to assess changes in strength, cardiorespiratory fitness, body composition, and psychological variables such as anxiety, stress, and self-esteem, using field-based physical tests (CMJ, Course Navette, handgrip strength, etc.) and validated questionnaires. The study follows a randomized controlled trial design with pre- and post-intervention assessments. The experimental group will complete two weekly CrossFit sessions adapted for children, while the control group will maintain their usual routine without structured physical training. The hypothesis states that the intervention will significantly improve both physical performance and psychological well-being in the experimental group compared to the control group.

NCT Number	NCT07552844
Lead Sponsor	Maimónides Biomedical Research Institute of Córdoba Collaborators: Universidad de Córdoba, Escuela Universitaria de Osuna
Conditions	Children, Crossfit, Psychology, Child, Physical Fitness, Body Composition
Enrollment	30 participants
Start Date	2026-06
Primary Completion	2026-06 (estimated)
Study Completion	2026-07 (estimated)
Updated on ClinicalTrials.gov	2026-04-30